I'm not looking to record each channel separately, I'm looking for it to be processed by the processor not sent to the Host PC but directly out to the speakers.Ĭlick to expand.How do you gonna preamp the Microphones? Is it in your design?. I want to preamp 4 microphones, and feed them into their own ADC, to be processed by a DSP and sent to speakers with low latency. I have a similar goal in my project but it is also much different. So if this is a commercial product you'll just need to design your widget first and then miniaturize it by eliminating extra parts and creating your own custom PCB. Most things can be miniaturized, but this would come at a cost (commercialization). The size limitations you speak about should be left until the very last piece of this project. Then you'll need an analog to digital converter (4 of them), and then you'll need a processor to perform data transfer to the USB Host using USB OTG. You need to preamp the sensors first, so the project must have a preamp. You want to then send that signal to a USB signal so you can record. So what I understand about your project is that you have a guitar with some piezo sensors which are supposed to pickup the sound from the strings. ( After I will find the stable solution I will design a small PCB)
3-4 High impedance inputs (>100Kohm) with configurable gain. So I am lost and I will be happy to get your help or ideas where to start.Ī short summary with the limits i've got : I have A Breakout boards, ( SparkFun Analog to Digital Stereo Converter Breakout - PCM1803A - BOB-09365 - SparkFun Electronics) but I will need to build an pre-amps.the inputs are 40K. My Piezos are probably higher than 100K SO I had to plan some pre-amp.this also cause a lot of strange things.Īt this point I wonder if I should give up with the Teensy soloution, and maybe looking for something else. The Teensy Audio Adapter has 1 mic input and 2 Line In inputs, the 2 Line in impedance are 29Kohm. I tried write a new object but I have failed with this mission.ģ.
#4 input usb audio interface Patch
The USBAudioOutput object of the teensy is capable of patch only 1 Stereo channel toward the PC. the Teensy Audio Board have very high self noise.Ģ. I tried to use Teensy 3.2 with 2 Audio Adapters, but I have faced with 3 major problems.ġ. I am trying to connect 3-4 piezo sensors (attached to guitar sound board) to my PC, the idea is that the "guitar" will be connected to the PC with USB cable so that means that I must turn the guitar into an audio interface. I Would be happy to get your help with my project.